/*
* Copyright (c) 2012 Data Harmonisation Panel
*
* All rights reserved. This program and the accompanying materials are made
* available under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution. If not, see <http://www.gnu.org/licenses/>.
*
* Contributors:
* HUMBOLDT EU Integrated Project #030962
* Data Harmonisation Panel <http://www.dhpanel.eu>
*/
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSResourceResolver;
/**
* Resolve imported/included schemas
*
* @author Simon Templer
* @partner 01 / Fraunhofer Institute for Computer Graphics Research
*/
public class SchemaResolver implements LSResourceResolver {
private final URI mainSchemaURI;
/**
* Constructor
*
* @param mainSchemaURI the location of the main schema
*/
public SchemaResolver(URI mainSchemaURI) {
super();
this.mainSchemaURI = mainSchemaURI;
}
/**
* @see LSResourceResolver#resolveResource(String, String, String, String,
* String)
*/
@Override
public LSInput resolveResource(String type, String namespaceURI, String publicId,
String systemId, String baseURI) {
String schemaLocation;
if (baseURI != null) {
schemaLocation = baseURI.substring(0, baseURI.lastIndexOf("/") + 1); //$NON-NLS-1$
}
else {
String loc = mainSchemaURI.toString();
schemaLocation = loc.substring(0, loc.lastIndexOf("/") + 1); //$NON-NLS-1$
}
if (systemId.indexOf("http://") < 0) { //$NON-NLS-1$
systemId = schemaLocation + systemId;
}
URI uri;
try {
uri = new URI(systemId);
uri = uri.normalize();
} catch (URISyntaxException e1) {
return null;
}
InputStream inputStream = null;
// fall-back
if (inputStream == null) {
try {
inputStream = uri.toURL().openStream();
} catch (Throwable e) {
return null;
}
}
LSInput lsin = new LSInputImpl();
lsin.setSystemId(uri.toString());
lsin.setByteStream(inputStream);
return lsin;
}
}